Compressing tool for welding molybdenum belt and leading belt

Abstract

A pressing tool for welding a molybdenum belt and a leading belt comprises a workbench, a hollow welding area is arranged in the middle of the workbench, and centering clamping mechanisms used for clamping the width side edges of the molybdenum belt and the leading belt are arranged on the two sides of the welding area respectively. Each centering clamping mechanism comprises two clamps arranged on the two sides of the workbench respectively, a synchronous driving component for driving the two clamps to move oppositely or oppositely is arranged at the bottom of the workbench, and the two clamps can extrude the two width sides of the molybdenum belt or the leading belt when moving oppositely, so that the molybdenum belt or the leading belt is centered in the width direction. After the two clamps abut against the width side of the molybdenum belt or the leading belt at the same time, the clamps turn over and press the upper surface of the molybdenum belt or the leading belt under the reverse extrusion force of the molybdenum belt or the leading belt. According to the pressing tool for welding the molybdenum belt and the leading belt, the molybdenum belt and the leading belt can be flexibly adjusted and positioned in the middle in a rapid and high-precision mode, the welding accuracy is effectively guaranteed, meanwhile, the pressing tool has good stability and can be operated by one person, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of molybdenum strip welding, in particular to a pressing tool for welding molybdenum strips and guide strips. Background Art

[0002] During the welding process of long molybdenum sheets / strips and leader strips, the overlapping positions of the molybdenum strips and leader strips need to be aligned in the center. This is usually done manually by hand and then welded. However, this method cannot guarantee center calibration and the center alignment accuracy is poor, which brings inconvenience to the subsequent process. In addition, in order to ensure that the molybdenum strips and leader strips do not shake during the welding process, two people are usually required to hand-hold and one person is required to weld. This requires many people in the welding process and high labor costs.

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a pressing tool for molybdenum strip welding. Utility Model Content

[0004] The purpose of the utility model is to provide a clamping tool for welding molybdenum strips and leader strips, which can be flexibly adjusted to achieve rapid and high-precision centering overlap and positioning of the molybdenum strips and leader strips, effectively ensuring the accuracy of welding, while having good stability, can be operated by one person, and reduces labor costs.

[0005] The technical solution adopted by the utility model is: a clamping tool for welding molybdenum strips and leader strips, comprising a workbench, a hollow welding area is set in the middle of the workbench, and centering clamping mechanisms for clamping the width side edges of the molybdenum strips and leader strips are respectively set on both sides of the welding area;

[0006] Each centering clamping mechanism includes two clamps respectively arranged on both sides of the workbench. A synchronous driving member is provided at the bottom of the workbench to drive the two clamps to move relative to or away from each other. When the two clamps move relative to each other, they can squeeze the two width sides of the molybdenum strip or leader to center the molybdenum strip or leader in the width direction. After the two clamps simultaneously abut against the width sides of the molybdenum strip or leader, the clamps flip over and press onto the upper surface of the molybdenum strip or leader under the reverse squeezing force of the molybdenum strip or leader;

[0007] Grooves are respectively provided on the upper surfaces of the workbench on both sides of the welding area, and elastic lifting members are arranged in the grooves. The elastic lifting members have a high-position conveying state and a low-position welding state that can be switched by lifting and lowering. The high-position conveying state of the elastic lifting members protrudes from the upper surface of the workbench, so that the molybdenum strip or the lead belt can slide on the upper side of the corresponding elastic lifting member and detach from the upper surface of the workbench; when the two clamps of the centering clamping mechanism are pressed to the upper surface of the molybdenum strip or the lead belt, the elastic lifting member can be pressed to the low-position welding state, so that the molybdenum strip or the lead belt contacts the upper surface of the workbench.

[0008] As a preferred solution, the clamp includes a side frame, a rotating shaft, an elastic retainer, a clamping plate and a stop lever;

[0009] The side frame is fixed to the outer end of the slider, and the top of the side frame is connected to a flip-up clamping plate by rotating through a rotating shaft. The clamping plate has a first clamping end located on the outer side of the edge of the molybdenum belt / leader belt, and a second clamping end located on the upper side of the surface of the molybdenum belt / leader belt. An elastic retaining member is connected between the side frame and the clamping plate, and the elastic retaining member keeps the second clamping end in a non-contact state when the reverse extrusion force is small.

[0010] As a preferred solution, the synchronous driving component includes a servo motor, a turntable and a connecting rod;

[0011] The servo motor is vertically fixed to the bottom surface of the workbench, and a turntable is fixed on the output shaft of the servo motor. Two convex shafts are opposite to each other on the edge of the upper surface of the turntable. Each convex shaft is rotatably connected to one end of a connecting rod, and the other ends of the two connecting rods are respectively rotatably connected to two sliders of the same centering clamping mechanism.

[0012] As a preferred solution, scale lines are provided on the upper surface of the workbench at the edge of the welding area.

[0013] As a preferred solution, there are two elastic lifting members, which are respectively arranged between the two sliders of each centering clamping mechanism.

[0014] As a preferred solution, the elastic lifting member includes a floating plate, a sliding rod, a compression spring and a ball;

[0015] The slide rod is arranged in the axial hole of the workbench along the sliding direction perpendicular to the upper surface of the workbench. A floating plate is fixed to the top of the slide rod. Ball grooves are distributed on the surface of the floating plate. Balls are arranged in the ball grooves to roll in contact with the molybdenum belt / lead belt.

[0016] As a preferred solution, a linear guide rail group is provided on the lower surface of the workbench so that its position can be adjusted along the width direction and the length direction.

[0017] As a preferred solution, the linear guide rail group includes two first guide rails and two second guide rails;

[0018] The two first guide rails are fixed side by side on the external mounting frame along the length direction of the workbench, the slides of the two first guide rails are fixed to the sides of the two second guide rails through rods, the second guide rails are arranged along the width direction of the workbench, and the slides of the second guide rails are fixed to the bottom surface of the workbench.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The fixture is moved relative to the width of the workbench to clamp the molybdenum strip and the leader tape in the center, so that the centers of the molybdenum strip and the leader tape are aligned after overlapping. This can be completed by one person, and the welding position is accurate.

[0021] 2. The fixture has two modes: extrusion on the outer side of the edge and extrusion on the upper surface;

[0022] During the centering adjustment process, the clamp is in the released state, and only squeezes the outer edges of the molybdenum strip and the leader, so that the molybdenum strip and the leader are adjusted to the appropriate position in the width direction; after the centering is completed, the clamp is in the clamping state, and at the same time squeezes the outer edges and the upper surface of the molybdenum strip and the leader, so that the molybdenum strip and the leader are completely fixed and not easy to move during the welding process;

[0023] During the centering process, the fixture does not squeeze the upper surfaces of the molybdenum strip and the guide belt, thereby avoiding scratches caused by relative movement of the fixture on the upper surfaces of the molybdenum strip and the guide belt during the adjustment process.

[0024] 3. Set up elastic lifting parts to support the molybdenum belt and the guide belt in a rolling manner, so that they can move in the width and length directions.

[0025] 4. The elastic lifting parts have a high-position conveying state and a low-position welding state. In the high-position conveying state, the molybdenum belt and the guide belt are separated from the upper surface of the workbench, reducing friction and facilitating the movement of the molybdenum belt and the guide belt. In the low-position welding state, the molybdenum belt and the guide belt are in contact with the upper surface of the workbench to ensure stability.

[0026] 5. The elastic lifting part is switched to the low-position welding state through the centering clamp of the fixture for easy control. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the overall axial side of the utility model;

[0029] Figure 2 A schematic diagram of a workbench of the present utility model;

[0030] Figure 3 It is a schematic diagram of the welding state of the utility model;

[0031] Figure 4 This is a schematic diagram of the synchronous drive component of the utility model;

[0032] Figure 5 This is a schematic diagram of the axial side of the fixture of the utility model;

[0033] Figure 6 This is a cross-sectional schematic diagram of the fixture of the utility model

[0034] Figure 7 It is a schematic cross-sectional view of the entire width direction of the present invention;

[0035] Figure 8 Schematic diagram of the linear guide rail assembly of the present invention.

[0036] Figure markings: 1. workbench, 101. welding area, 2. molybdenum strip, 3. guide belt, 4. slider, 5. clamp, 501. side frame, 502. rotating shaft, 503. elastic retaining member, 504. clamping plate, 5041. first clamping end, 5042. second clamping end, 505. stop lever, 6. elastic lifting member, 601. floating plate, 602. sliding rod, 603. compression spring, 604. ball bearing, 7. servo motor, 8. turntable, 9. connecting rod, 10. scale line, 11. first guide rail, 12. second guide rail, 13. welding gun. DETAILED DESCRIPTION

[0037] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may also be beneficially combined in other embodiments.

[0038] It should be noted that: unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "one", "an" or "the" and the like used in the specification and claims of the present utility model patent application do not express quantity restrictions, but rather indicate the presence of at least one; the words "first", "second" and "third" used herein shall not be regarded as restrictions on the order of components, but merely serve to distinguish different components; words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function.

[0039] In order to more clearly describe the specific structure of the clamping tool for welding molybdenum strips and guide strips, Figure 1-8 Describe this embodiment:

[0040] like Figure 1 and Figure 2As shown, a clamping fixture for welding molybdenum ribbon and leader tape comprises a workbench 1 with a hollowed-out welding area 101 in the center. On either side of welding area 101 are centering clamping mechanisms for clamping the widthwise edges of the molybdenum ribbon 2 and leader tape 3. Before welding, the molybdenum ribbon 2 and leader tape 3 are placed on either side of the workbench's upper surface, with one end of the ribbon 2 and leader tape 3 overlapping at welding area 101. The centering clamping mechanism is then used to move the ribbon 2 / lead tape 3 to the center of the workbench 1 widthwise. When both the ribbon 2 and leader tape 3 are centered, their overlapping centers align.

[0041] Each centering clamping mechanism includes two clamps 5, one on each side of the workbench 1. A synchronous drive member is installed at the bottom of the workbench 1, driving the two clamps 5 to move toward or away from each other. When the two clamps 5 move relative to each other, they squeeze the width sides of the molybdenum strip 2 or leader 3, centering the strip 2 or leader 3 in the width direction. After the two clamps 5 simultaneously abut the width sides of the strip 2 or leader 3, the clamps 5 flip over and press against the upper surface of the strip 2 or leader 3 under the opposing pressure of the strip 2 or leader 3. When the two clamps 5 of the same centering clamping mechanism move relative to each other, they squeeze the width sides of the strip 2 / lead 3, moving the strip 2 / lead 3 to the center of the width direction of the workbench 1.

[0042] A scale mark 10 is provided on the upper surface of the workbench 1 at the edge of the welding area 101 , which can be used to visually check the centering position of the molybdenum strip 2 or the leader strip 3 .

[0043] The clamp 5 has two modes of compression: squeezing the outer edges and squeezing the upper surface. During the centering adjustment process, the clamp 5 is in the released state, squeezing only the outer edges of the molybdenum strip 2 and leader 3, adjusting the strips 2 and 3 to the proper position in the width direction. After centering is complete, the clamp 5 is in the "clamping state," squeezing the outer edges and upper surfaces of the molybdenum strips 2 and leader 3 simultaneously, completely securing them and preventing them from moving during welding. During the centering process, the clamp 5 does not squeeze the upper surfaces of the molybdenum strips 2 and leader 3, preventing scratches caused by relative movement of the clamp 5 on the upper surfaces of the molybdenum strips 2 and leader 3 during the adjustment process.

[0044] See Figure 5 and Figure 6The clamp 5 specifically includes the following structures: a side frame 501, a rotating shaft 502, an elastic retaining member 503, a clamping plate 504 and a stop lever 505; the side frame 501 is fixed to the outer end of the slider 4, and the top of the side frame 501 is rotatably connected to a flip-up clamping plate 504 through the rotating shaft 502, and the clamping plate 504 has a first clamping end 5041 located on the outside of the edge of the molybdenum belt 2 / lead belt 3, and a second clamping end 5042 located on the upper side of the surface of the molybdenum belt 2 / lead belt 3, and an elastic retaining member 503 is connected between the side frame 501 and the clamping plate 504, and the elastic retaining member 503 keeps the second clamping end 5042 in a non-contact state when the reverse extrusion force is small. When the workbench 1 is in a state of being stretched, the first clamping end 5041 of the clamping device 504 is pressed against the workbench 1 and the second clamping end 5042 is pressed against the workbench 1. When the workbench 1 is in a state of being stretched, the first clamping end 5041 of the clamping device 504 is pressed against the workbench 1 and the second clamping end 5042 is pressed against the workbench 1. When the workbench 1 is in a state of being stretched, the first clamping end 5041 of the clamping device 504 is pressed against the workbench 1 and the second clamping end 5042 is pressed against the workbench 1

[0045] The elastic retaining member 503 can be a torsion spring. During the specific installation, the torsion spring is sleeved on the rotating shaft 502, and the two ends of the torsion spring are respectively clamped on the side frame 501 and the clamping plate 504. When the reverse extrusion force applied to one of the clamping ends (the first clamping end 5041 or the second clamping end 5042) is small (the force that drives the molybdenum strip 2 / lead strip 3 to move in the width direction), the torsion spring is torsionally small or does not twist. When the clamping ends of the two clamps squeeze the width side edges of the molybdenum strip 2 / lead strip 3 at the same time, they can generate a force sufficient to flip the clamping plate 504, causing the torsion spring to twist greatly.

[0046] See Figure 4In the above embodiment, the synchronous drive component is used to drive the relative movement of the two clamps on the same centering clamping mechanism. For example, it may include a servo motor 7, a turntable 8, and a connecting rod 9. The servo motor 7 is vertically fixed to the bottom surface of the workbench 1. The turntable 8 is fixed to the output shaft of the servo motor 7. Two protruding shafts are positioned on the upper edge of the turntable 8. Each protruding shaft is rotatably connected to one end of a connecting rod 9. The other ends of the two connecting rods 9 are rotatably connected to the two sliders 4 of the same centering clamping mechanism. During use, the turntable 8 is driven by the servo motor 7 to rotate. The turntable 8 pulls the corresponding slider through the connecting rod 9, thereby moving the slider 4 along the width direction of the workbench 1. The specific arrangement requires a controller for controlling the servo motor 7. The controller is used to preset the rotation angle of the turntable 8. The controller drives the turntable 8 to rotate during centering and resets the turntable 8 when closed, so that the two clamps 5 of the same centering clamping mechanism are at their farthest distance from each other.

[0047] The synchronous drive component can also be in other forms, such as replacing the turntable 8 and the connecting rod 9 with a gear and a rack respectively, and driving the two racks to slide relative to or away from each other through the rotation of the gear, which can also achieve the relative and away movement of the two sliders 4.

[0048] Grooves are respectively provided on the upper surfaces of the workbench 1 on both sides of the welding area 101, and elastic lifting members 6 are arranged in the grooves. The elastic lifting members 6 have a high-position conveying state and a low-position welding state that can be switched by lifting and lowering. The high-position conveying state of the elastic lifting members 6 protrudes from the upper surface of the workbench 1, so that the molybdenum strip 2 or the lead tape 3 can slide on the upper side of the corresponding elastic lifting members 6 and detach from the upper surface of the workbench 1; when the two clamps 5 of the centering clamping mechanism are pressed to the upper surface of the molybdenum strip 2 or the lead tape 3, the elastic lifting member 6 can be pressed to the low-position welding state, so that the molybdenum strip 2 or the lead tape 3 contacts the upper surface of the workbench 1.

[0049] An elastic lifting member 6 is provided to rollingly support the molybdenum belt 2 and the guide belt 3 so as to facilitate the movement of the molybdenum belt 2 and the guide belt 3 in the width direction and the length direction.

[0050] There are two elastic lifting members 6 for conveying the molybdenum belt 2 and the leader belt 3, and they are respectively arranged between the two sliders 4 of each centering clamping mechanism.

[0051] See Figure 7The elastic lifting member 6 comprises a floating plate 601, a slide bar 602, a compression spring 603, and a ball bearing 604. The slide bar 602 slides perpendicularly to the upper surface of the worktable 1 within the axial hole of the worktable 1. The top of the slide bar 602 is secured to the floating plate 601, which has ball grooves arranged on its surface. Ball bearings 604 are positioned within the grooves, and roll in contact with the molybdenum strip 2 and the guide belt 3. In the high-position conveying state, the molybdenum strip 2 and the guide belt 3 are separated from the upper surface of the worktable 1, supported only by the rotatable ball bearings 604. This low-friction design facilitates the movement of the molybdenum strip 2 and the guide belt 3. In the low-position welding state, the molybdenum strip 2 and the guide belt 3 are in contact with the upper surface of the worktable, ensuring stability. After the clamp 5 reaches the "clamping state" of squeezing the outer side of the edge and the upper surface, the second clamping end 5042 applies a downward squeezing force to the upper surface of the molybdenum strip 2 / lead strip 3, causing the floating plate 601 to squeeze the compression spring 603. The entire floating plate 601 is subjected to pressure and descends until the molybdenum strip 2 / lead strip 3 contacts the upper surface of the workbench 1.

[0052] The lower surface of the workbench 1 is equipped with linear guide rails that allow for adjustment of its position in both the width and length directions. The linear guide rails are used to adjust the position of the workbench 1 as needed, ensuring that the overlap between the molybdenum strip 2 and the leader strip 3 after centering is within the working range below the welding gun 13.

[0053] See Figure 8 The linear guide rail group can be arranged in the following manner, including two first guide rails 11 and two second guide rails 12. The two first guide rails 11 are fixed on the external mounting frame in parallel along the length direction of the workbench 1. The slides of the two first guide rails 11 are fixed to the sides of the two second guide rails 12 through rods. The second guide rails 12 are arranged along the width direction of the workbench 1, and the slides of the second guide rails 12 are fixed to the bottom surface of the workbench 1.

[0054] During the entire use process: first, the molybdenum strip 2 and the leader strip 3 are placed on the elastic lifting members 6 on both sides of the upper surface of the workbench, so that one end of the molybdenum strip 2 and the leader strip 3 overlaps in the welding area 101, and then the two clamps 5 of the centering clamping mechanism are used to squeeze the width side edges of the molybdenum strip 2 / lead strip 3 in a relative motion, so that the molybdenum strip 2 / lead strip 3 is adjusted and centered along the width direction of the workbench 1. After the two clamps 5 simultaneously abut against the width side of the molybdenum strip 2 or leader strip 3, the clamps 5 are flipped and pressed to the upper surface of the molybdenum strip 2 or leader strip 3 under the reverse extrusion force of the molybdenum strip 2 or leader strip 3. The upper surface extrusion causes the molybdenum strip 2 / lead strip 3 and the elastic lifting member 6 to descend, and the molybdenum strip 2 / lead strip 3 descends to fit the upper surface of the workbench 1. At this time, it is completely stable, and the overlapping seam of the molybdenum strip 2 and the leader strip 3 can be welded by controlling the welding gun 13.

[0055] Parts not described in detail in this embodiment are prior art.

[0056] It should be noted that although the present invention has been described through the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and modifications to the present invention, and such changes and modifications shall fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A clamping tool for welding molybdenum strips and guide strips, characterized by: The workbench (1) comprises a hollow welding area (101) in the middle of the workbench (1), and centering clamping mechanisms for clamping the width side edges of the molybdenum strip (2) and the lead strip (3) are respectively provided on both sides of the welding area (101); Each centering clamping mechanism comprises two clamps (5) respectively arranged on both sides of the workbench (1); a synchronous driving member for driving the two clamps (5) to move relative to or opposite to each other is provided at the bottom of the workbench (1); the two clamps (5) can squeeze the two width sides of the molybdenum strip (2) or the leader (3) when they move relative to each other, so that the molybdenum strip (2) or the leader (3) is centered in the width direction; after the two clamps (5) simultaneously abut against the width sides of the molybdenum strip (2) or the leader (3), the clamps (5) are turned over and pressed onto the upper surface of the molybdenum strip (2) or the leader (3) under the reverse extrusion force of the molybdenum strip (2) or the leader (3); The upper surfaces of the work tables (1) on both sides of the welding area (101) are respectively provided with grooves, and elastic lifting members (6) are arranged in the grooves. The elastic lifting members (6) have a high-position conveying state and a low-position welding state that can be lifted and switched. The high-position conveying state of the elastic lifting members (6) protrudes from the upper surface of the work table (1), so that the molybdenum strip (2) or the guide strip (3) can slide on the upper side of the corresponding elastic lifting members (6) and detach from the upper surface of the work table (1); when the two clamps (5) of the centering clamping mechanism are pressed onto the upper surface of the molybdenum strip (2) or the guide strip (3), the elastic lifting members (6) can be pressed to the low-position welding state, so that the molybdenum strip (2) or the guide strip (3) contacts the upper surface of the work table (1).

2. A clamping tool for welding molybdenum strips and guide strips according to claim 1, characterized in that: The clamp (5) comprises a side frame (501), a rotating shaft (502), an elastic retaining member (503) and a clamping plate (504); The side frame (501) is fixed to the outer end of the slider (4), and the top of the side frame (501) is rotatably connected to a flip-up clamping plate (504) via a rotating shaft (502). The clamping plate (504) has a first clamping end (5041) located outside the edge of the molybdenum belt (2) or the leader belt (3), and a second clamping end (5042) located above the surface of the molybdenum belt (2) or the leader belt (3). An elastic retaining member (503) is connected between the side frame (501) and the clamping plate (504). The elastic retaining member (503) maintains the second clamping end (5042) in a non-contact state when the reverse extrusion force is small.

3. The clamping tool for welding molybdenum strips and guide strips according to claim 1, characterized in that: The synchronous driving component includes a servo motor (7), a turntable (8) and a connecting rod (9); The servo motor (7) is vertically fixed to the bottom surface of the workbench (1), and a turntable (8) is fixed on the output shaft of the servo motor (7). Two convex shafts are opposite to each other on the edge of the upper surface of the turntable (8), and each convex shaft is rotatably connected to one end of a connecting rod (9). The other ends of the two connecting rods (9) are respectively rotatably connected to two sliders (4) of the same centering clamping mechanism.

4. The clamping tool for welding molybdenum strips and guide strips according to claim 1, characterized in that: A scale line (10) is provided on the upper surface of the workbench (1) at the edge of the welding area (101).

5. The clamping tool for welding molybdenum strips and guide strips according to claim 1, characterized in that: There are two elastic lifting members (6), which are respectively arranged between the two sliders (4) of each centering clamping mechanism.

6. The clamping tool for welding molybdenum strips and guide strips according to claim 1, characterized in that: The elastic lifting member (6) comprises a floating plate (601), a sliding rod (602), a compression spring (603) and a ball (604); The slide bar (602) is arranged in the axial hole of the workbench (1) along a sliding direction perpendicular to the upper surface of the workbench (1), and a floating plate (601) is fixed to the top of the slide bar (602). Ball grooves are distributed on the surface of the floating plate (601), and balls (604) are arranged in the ball grooves to roll in contact with the molybdenum belt (2) or the guide belt (3).

7. The clamping tool for welding molybdenum strips and guide strips according to claim 1, characterized in that: The lower surface of the workbench (1) is provided with a linear guide rail group that enables the position of the workbench to be adjusted along the width direction and the length direction.

8. A clamping tool for welding molybdenum strips and guide strips according to claim 7, characterized in that: The linear guide rail assembly includes two first guide rails (11) and two second guide rails (12); Two first guide rails (11) are fixed on an external mounting frame in parallel along the length direction of the workbench (1); the slides of the two first guide rails (11) are fixed to the sides of the two second guide rails (12) through rods; the second guide rails (12) are arranged along the width direction of the workbench (1), and the slides of the second guide rails (12) are fixed to the bottom surface of the workbench (1).

Images